Package org.apache.pdfbox.debugger.ui
Class RecentFiles
- java.lang.Object
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- org.apache.pdfbox.debugger.ui.RecentFiles
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public class RecentFiles extends java.lang.Object
A class to save recent file history in preference using java Preference api.
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Field Summary
Fields Modifier and Type Field Description private java.util.Queue<java.lang.String>
filePaths
private static java.lang.String
HISTORY_LENGTH
private static java.lang.String
KEY
private int
maximum
private static java.lang.String
PATH_KEY
private static java.lang.String
PIECES_LENGTH_KEY
private java.util.prefs.Preferences
pref
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Constructor Summary
Constructors Constructor Description RecentFiles(java.lang.Class className, int maximumFile)
Constructor.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
addFile(java.lang.String path)
Add a new file in recent file history.private java.lang.String[]
breakString(java.lang.String fullPath)
void
close()
This method save the present recent file history in the preference.java.util.List<java.lang.String>
getFiles()
This gives the file in descending order where order is according to the time it is added.boolean
isEmpty()
Check if file history is empty.private java.util.Queue<java.lang.String>
readHistoryFromPref()
void
removeAll()
Clear the previous recent file history.void
removeFile(java.lang.String path)
Remove a file from recent file history.private void
writeHistoryToPref(java.util.Queue<java.lang.String> filePaths)
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Field Detail
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KEY
private static final java.lang.String KEY
- See Also:
- Constant Field Values
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PATH_KEY
private static final java.lang.String PATH_KEY
- See Also:
- Constant Field Values
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PIECES_LENGTH_KEY
private static final java.lang.String PIECES_LENGTH_KEY
- See Also:
- Constant Field Values
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HISTORY_LENGTH
private static final java.lang.String HISTORY_LENGTH
- See Also:
- Constant Field Values
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pref
private final java.util.prefs.Preferences pref
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filePaths
private java.util.Queue<java.lang.String> filePaths
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maximum
private final int maximum
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Method Detail
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removeAll
public void removeAll()
Clear the previous recent file history.
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isEmpty
public boolean isEmpty()
Check if file history is empty.- Returns:
- if history is empty return true otherwise return false.
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addFile
public void addFile(java.lang.String path)
Add a new file in recent file history.- Parameters:
path
- path to the file. this path means File#getPath() method returned String.
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removeFile
public void removeFile(java.lang.String path)
Remove a file from recent file history.- Parameters:
path
- path string to the file. this path means File#getPath() method returned String.
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getFiles
public java.util.List<java.lang.String> getFiles()
This gives the file in descending order where order is according to the time it is added. This checks for file's existence in file history.- Returns:
- return the file paths in a List.
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close
public void close() throws java.io.IOException
This method save the present recent file history in the preference. To get the recent file history in next session this method must be called.- Throws:
java.io.IOException
- if saving in preference doesn't success.
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breakString
private java.lang.String[] breakString(java.lang.String fullPath)
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writeHistoryToPref
private void writeHistoryToPref(java.util.Queue<java.lang.String> filePaths)
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readHistoryFromPref
private java.util.Queue<java.lang.String> readHistoryFromPref()
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